78506674543650 has 192 divisors, whose sum is σ = 198207480695040. Its totient is φ = 20558734156800.

The previous prime is 78506674543643. The next prime is 78506674543667. The reversal of 78506674543650 is 5634547660587.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20375465124 + ... + 20375468976.

It is an arithmetic number, because the mean of its divisors is an integer number (1032330628620).

Almost surely, 2^{78506674543650} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78506674543650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99103740347520).

78506674543650 is an abundant number, since it is smaller than the sum of its proper divisors (119700806151390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78506674543650 is a wasteful number, since it uses less digits than its factorization.

78506674543650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6941 (or 6936 counting only the distinct ones).

The product of its (nonzero) digits is 508032000, while the sum is 66.

The spelling of 78506674543650 in words is "seventy-eight trillion, five hundred six billion, six hundred seventy-four million, five hundred forty-three thousand, six hundred fifty".